Finding the Fourth Proportional to 78,422.91, 108,223.40 and 42,613.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,422.91 : 108,223.40 = 42,613.05 : x
2. Step 2: Convert to fraction form
   78,422.91/108,223.40 = 42,613.05/x
3. Step 3: Cross multiply
   78,422.91x = 108,223.40 × 42,613.05
4. Step 4: Simplify right side
   78,422.91x = 4,611,728,942.30
5. Step 5: Solve for x
   x = 4,611,728,942.30/78,422.91
6. Step 6: Final answer
   x = 58,805.89